Reliance 57C409 57409-G Analog Input Module

Two-channel analog input module 57C409 / 57409-G for Reliance Electric Automax PLC systems. This isolated A/D card provides two analog input channels that feed sensor signals into the PLC backplane, enabling real-time data acquisition for process control tasks. Identified by the part numbers 57C409 and 57409-G, the module has been listed in multiple catalogs and aftermarket references as the Reliance Electric Automax analog input card and is also documented in ABB and Artisan listings as the 57C409, 2-Channel Analog Input Module. Typical applications include interfacing analog sensors such as temperature, pressure, or level devices to older automation architectures for monitoring and control, data logging, or interlock logic. The device is designed to operate within Reliance Electric’s automation hardware lineage and to integrate with compatible racks/backplanes, providing straightforward signal conditioning and digitization for PLC-based control systems.